Gavin P. Grant, Ph.D., P.Eng.
Dr. Grant, Operations, has more than 10 years of experience in the field of environmental remediation and the development and implementation of the Self-sustaining Treatment for Active Remediation (STAR) technology. He completed his Ph.D. studies at the University of Edinburgh, Scotland, under the direction of Dr. Jason Gerhard and Prof. Jose Torero – the co-inventors of the STAR technology. Dr. Grant is the Operations lead for Savron and has been the primary project manager, director, or technical lead on all STAR-related projects to date. He has completed dozens of treatability studies and numerous pilot tests and full-scale implementations of the STAR technology and is currently managing STAR projects for top-tier clients in the chemical manufacturing, oil and gas, and utility industries.
Dr. Grant continues to advance the state of the practice as a frequent presenter at events and lectures focused on soil contamination and organic waste disposal.
PLATFORM PRESENTER - Thermal Treatment: It's Cookout Time
Smoldering Combustion (STAR and STARx) for the Treatment of Contaminated Soils and Liquid Organic Wastes: Challenges Encountered & Lessons Learned In Providing a New Remediation Technology to the Industry
STAR (in situ) and STARx (ex situ) are innovative remediation technologies based on the principles of smoldering combustion where the contaminants are the source of fuel. This presentation presents background information on the technologies and case studies highlighting lessons learned for successful implementation.
The first part of the presentation will focus on in situ applications of STAR and present a series of case studies. The first case study involved the STAR treatment of two contaminated horizons (DNAPL and LNAPL) in a fine sand unit at a former Gasworks Site in northern Michigan. Self-sustaining smoldering combustion was achieved in both the LNAPL and DNAPL zones resulting in a Radius of Influence (ROI) of approximately 8 feet with an average propagation rate of approximately one foot per day. However, air flow fluctuations during the first test lead to premature quenching of the combustion reaction, demonstrating the importance of a steady air supply on the smoldering combustion process. The second case study involved the first in-situ field application of a surrogate fuel (emulsified vegetable oil [EVO]) to support combustion of high volatility compounds including Gasoline Range Organic (GRO) and Diesel Range Organic (DRO) compounds at a former refinery in Michigan. Successful injection and combustion of EVO resulted in a more robust smoldering reaction, with an increased ROI as compared to the “standard” STAR test. The third case study involved the STAR treatment of Navy Special Fuel Oil (NSFO) within a former tank farm area in Virginia. The field test demonstrated that the smoldering reaction successfully treated contaminated soil located both above and below a discontinuous clay layer. The final case study involved the full-scale STAR treatment of a former manufacturing facility in New Jersey. Approximately 1500 surficial fill ignition points and 500 deep sand ignition points and two treatment systems (air distribution and vapor collection / treatment system) are being used to remediate an approximately 14-acre footprint of contaminated soils.
The second part of the presentation will focus on ex situ applications of STARx and describe a rigorous prototype testing program and the application of STARx for three sites involving: 1) tank bottom residuals and petroleum hydrocarbon-impacted soils; 2) crude oil-impacted sands; and 3) hydrocarbon-impacted fine-grained materials. These applications encountered a wide range of issues from fine-grained materials, low concentration soils, lagoon sludge, and other unique aspects of the sites, thus demonstrating the flexibility of the system to meet project-specific needs.